ManiaDrive is a free clone of Trackmania, the great game from Nadéo
studio, and is an arcade car game on acrobatic tracks, with a quick
and nervous gameplay (tracks almost never exceed one minute), and
features a network mode, as the original.
Raydium is a game engine. It provides a set of functions which allow
quick and flexible games creation.
Functions covers things like player inputs (keyboard, mouse, joystick,
joypad, force feedback), rendering (3D objets, OSD (On Screen
Display)), time (a game must run at the exact same speed on every
computer), sound, ...